KR20200019439A - Press apparatus having cushion pressure corrected function of slide - Google Patents

Abstract

The present invention relates to a press device with a slide cushion pressure correction function, wherein a slide adapter with an upper mold installed therein is formed at a lower portion of a slide of a press. A plurality of cushion pins, which are connected to the upper mold and vertically communicate therewith, are inserted into the slide adapter. Installed at an upper portion of the slide adapter is a pin plate which comes in contact with an upper end of the cushion pins such that the pressure of the press can be vertically delivered. A buffering space is formed at an upper portion of the pin plate. In the buffering space, a plurality of air bellows assemblies are installed to be aligned in a checkerboard shape in multiple rows and columns. Furthermore, the present invention further comprises: a compressed air supply means composed of a compressor which generates compressed air, an even pressure chamber having an inlet connected to the compressor, an expansion flow path which is gradually expanded from the inlet, and a plurality of outlets which are branched from the expansion flow path to supply the compressed air to the air bellows assemblies, and a pressure control valve which is installed at the compressed air inlet side of the air bellows assemblies; and a pressure control means composed of a sensor unit which detects the pressure in the air bellows assemblies, and a control unit which calculates an output value of the sensor unit to control the compressor or the pressure control valve such that the pressure value in each of the air bellows assemblies can be always within a predetermined value. Therefore, the pressure of the press can be evenly distributed to enable a precise processing work. In addition, an impact generated during a press work can be buffered such that the expensive press equipment can be safely managed.

Description

Press apparatus having a slide pressure correction function {Press apparatus having cushion pressure corrected function of slide}

The present invention relates to a press apparatus having a slide cushion pressure correction function, and more particularly, a buffer space is formed in a slide of a press, and a plurality of air bellows assemblies are arranged in a plurality of rows and columns in the buffer space to form a checkerboard. The present invention relates to a slide press apparatus in which a press pressure is uniformly distributed and a precision processing operation is possible by uniformly distributing compressed air of a compressor to a plurality of air bellows assemblies through a pressure equalizing chamber having an expansion passage.

In general, a press die is an apparatus for molding a metal sheet into a product of a desired shape by pressing a metal sheet with a large force such as a machine or hydraulic pressure using a die of a predetermined shape.

This press method can be produced in a relatively simple manner from small and simple parts of various products to large and complex parts by sequentially or simultaneously performing drawing, punching, bending and cutting. It is widely used throughout the industry due to its advantages.

1 is a schematic diagram showing a press structure of the prior art.

Referring to FIG. 1, the prior art press is installed on the slide 10 and has an upper die 11 having a top surface shape of a product panel, and a lower bolster 12 mounted on a slide 10 and having a bottom surface shape of a product panel. The lower mold punch 13, a blank holder 14 disposed outside the lower mold punch 13 to pressurize the panel, and a cushion pad provided to provide a cushion pressure to the blank holder 14 installed under the bolster 12. 20 and a cushion pin 30 for connecting the cushion pad 20 and the blank holder 14 are proposed.

Conventional press apparatuses providing such a structure are die-cushioned press apparatuses which cushion a shock due to press pressure by incorporating a cushion device interlocked with a cushion pad and a cushion pin on a die side where a lower die punch is formed.

However, such a bed (die) built-in die cushion device has a problem that is difficult to manufacture a product having a complicated shape.

In addition, the prior art has a problem that the panel is wrinkled or the appearance is bent when the surface pressure is not evenly distributed to the blank holder and a locally non-uniform pressure is applied.

The reason for the non-uniformity of the blank holding force is that a gap occurs between the blank holder and the cushion pin due to the bending of the blank holder or the cushion pad, and thus the cushion pin does not transmit uniform pressure to the blank. As a result of the inability to deliver a uniform pressure, an unbalance of the molding pressure occurs and accordingly, the surface contact state of the blank holder is different so that quality problems such as wrinkles and bursts occur repeatedly, and the molding pressure and contact state are made even. Repeated mold modifications caused excessive costs and increased mold manufacturing labor.

Republic of Korea Patent Publication 10-2010-0021917

The present invention has been made in order to solve the above problems, the object of the invention is to be able to produce a product with a complex shape, the press pressure is uniformly distributed to enable precise machining work, the impact generated during the press work It is to provide a press having a cushion pressure correction function of the slide to buffer and to securely manage expensive press equipment.

According to an aspect of the present invention for achieving the above object, a slide adapter in which the upper die is installed is formed in the lower slide of the press, the slide adapter is interpolated with a plurality of cushion pins connected to the upper die and vertically interlocked The upper part of the slide adapter is in contact with the upper end of the cushion pin pin plate is installed so that the press pressure is transmitted up and down, a buffer space is formed on the upper pin plate, a plurality of air bellows assembly in the buffer space a plurality of rows To install the tiles in the form of tiles,

A compressor for generating compressed air, an inlet connected to the compressor, an expansion channel gradually extending from the inlet, and a plurality of discharge ports branched from the expansion channel to supply compressed air to the air bellows assembly; Compressed air supply means consisting of a pressure equalizing chamber and a pressure control valve installed on the compressed air inlet side of the air bellows assembly; And a control unit for detecting a pressure in the air bellows assembly, and a control unit for calculating an output value of the sensor line unit and controlling a compressor or a pressure control valve so that a pressure value in each air bellows assembly is always within a set value. Means; a press apparatus having a slide cushion pressure correction function, characterized in that it further comprises.

The present invention as described above forms a buffer space in the slide of the press, the plurality of air bellows assembly is arranged in the form of a checkerboard to match a plurality of rows and columns in the buffer space, through a pressure equalizing chamber having an expansion passage By uniformly distributing the compressed air of the compressor to a plurality of air bellows assemblies, the press pressure is uniformly distributed, enabling precise machining operations, and buffering the impact generated during press operations to safely manage expensive press equipment. Has the effect.

In addition, the present invention allows for quick recovery after the contraction movement of the air bellows assembly through the auxiliary actuator, thereby ensuring the promptness of the press operation, which has the effect of improving productivity.

1 is a schematic diagram showing a press structure of the prior art.
Figure 2 is a front view showing a press device having a slide cushion pressure correction function according to the present invention.
Figure 3 is a schematic diagram showing the air pressure distribution structure of the pressure equalizing chamber according to the present invention.
4 is an enlarged view of an air bellows assembly according to the present invention.
Figure 5 is a plan view of the air bellows assembly according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a front view showing a press device having a slide cushion pressure correction function according to the present invention.

Figure 3 is a schematic diagram showing the air pressure distribution structure of the pressure equalizing chamber according to the present invention.

4 is an enlarged view of an air bellows assembly according to the present invention.

Figure 5 is a plan view of the air bellows assembly according to the present invention.

Referring to FIG. 2, in the present invention, a slide adapter 120 in which an upper die is installed is formed at a lower portion of the slide 110 of the press, and the slide adapter 120 is connected to the upper die in a plurality of cushions interlocked in a vertical direction. The pins 130 are interpolated, and the pin plate 140 is installed on the slide adapter 120 to contact the upper end of the cushion pin 130 so that press pressure is transmitted up and down, and a buffer space is provided on the pin plate 140. 150 is formed, and the plurality of air bellows assembly 160 is arranged in the form of a checkerboard to align a plurality of rows and columns in the buffer space 150.

Hereinafter, the detailed structure of each component and the organic relationship and effect | action between each component are demonstrated.

The slide 110 is a component that is installed on the upper side of the press and slides in the vertical direction, and when the lowering is mounted, the upper die is mounted and collides with the lower die of the bet (bolster) portion installed at the bottom of the press to press the metal plate. Process the shape of the product.

At this time, the slide adapter 120, the upper die is installed is formed in the lower portion of the slide (110).

The slide adapter 120 is a structure having a metal block shape, the edge portion is coupled to the slide 110 main body is operated up and down with the slide 110 main body.

In addition, when viewed in a planar direction, a plurality of pinholes 121 are drilled so as to be uniformly distributed in the row and column directions, and cushion pins 130 are interpolated in the drilled pinholes to enable vertical operation.

In addition, adapter holes 123 are installed on the bottom of the slide adapter 120 to install an upper die.

In addition, the pin plate 140 is installed on the slide adapter 120 to contact the upper end of the cushion pin 130 so that the press pressure is transmitted up and down.

The pin plate 140 is installed in a separated state without being fixed to the slide adapter 120 or the slide 110, the flow in the vertical direction is possible.

In this case, a cushion plate 170 may be further installed between the slide adapter 120 and the pin plate 140. The cushion plate 170 may be blocked by a surface contacting the cushion pin 130. Lifted by the press pressure delivered to 130, the pressure is transmitted to the upper pin plate 140 and the air bellows assembly 160.

In addition, a buffer space 150 is formed on the pin plate 140, and a plurality of air bellows assemblies 160 are arranged in a checkerboard form in the buffer space 150.

At this time, the lower portion of the air bellows assembly 160 is coupled to the upper surface of the pin plate 140, the upper portion of the air bellows assembly 160 is coupled to the slide 110 body side, the upper portion of the air bellows assembly 160 The movement is fixed by being coupled to the side, while the lower portion is interlocked together according to the vertical movement of the pin plate 140.

Figure 3 is a schematic diagram showing the air pressure distribution structure of the pressure equalizing chamber according to the present invention.

Referring to FIG. 3, the present invention provides a plurality of air bellows assemblies 160 with compressed air supply means for equalizing pressure distribution.

As the most important component of the compressed air supply means, the configuration of the pressure equalizing chamber 210 will be described. The pressure equalizing chamber 210 is connected to the compressor 200 which generates compressed air through an air hose. As a result, the equalization chamber 210 receives the compressed air generated from the compressor 200 and fills the air bellows assembly 160.

In this case, the pressure equalizing chamber forms an inlet 211 connected to the compressor 200, and forms an expansion passage 213 gradually extending from the inlet 211.

The expansion passage 213 provides an inverted triangular structure in which an inner volume of the expansion passage 213 becomes wider as it moves away from the inlet 211. This is to overcome the pressure difference generated at each discharge port 215 when compressed air having a constant pressure flows through the inlet 211 and then exits through the plurality of discharge ports 215.

For example, in the case of forming the pressure equalizing chamber 210 in the form of a constant diameter, the discharge port 215 is closer to the inlet 211 side, the greater the discharge pressure is taken, and gradually away from the inlet port 211 side, the outlet ahead The discharge pressure gradually drops due to the flow rate loss at 215.

In this case, not only a deviation of the air pressure supplied to the entire air bellows assembly 160 is generated, but a uniform pressure distribution is not made during the press operation, resulting in a failure of the mold pressure product, and due to unbalance of the slide component. It will provide the cause of wear and tear.

Accordingly, in the present invention, the problem of flow rate loss is to be overcome by changing the volume, and as shown in the present invention, the discharge pressure at the entire discharge port 215 can be evenly distributed through the equalizing chamber in the inverted triangle shape.

In addition, a pressure control valve 220 is installed at the compressed air inlet side of the air bellows assembly 160, and the pressure control valve 220 prevents backflow of air pressure in the air bellows 161. It may include an overpressure shut-off valve for blocking the injection over a predetermined air pressure.

As shown in FIG. 5, the equalization chamber 210 may have a plurality of equalization chambers formed along the arrangement rows of the air bellows assembly 160.

5 exemplarily shows a form in which two columns are arranged.

In addition, the diameter of the discharge port 215 of the pressure equalizing chamber 210 may be formed step by step from the small diameter discharge port 215 to the gradually larger diameter discharge port 215 in the order of being closer to the inlet port 211.

In addition, in the accompanying drawings, the air supply unit for supplying compressed air to the inside of the air bellows 161 to control the internal pressure is shown as an upper side of the air bellows 161, but a separate space on the bottom of the lower cap 163 It may be secured to form an air nozzle and a pipeline.

In addition, the present invention provides a pressure control means for the cushion pressure correction of the plurality of air bellows assembly (160).

Referring to FIG. 3, the pressure control means calculates an output value of the sensor unit 230 that detects the pressure in the air bellows assembly 160, and the sensor line 230, and the pressure in each air bellows assembly 160. The control unit 240 controls the compressor 200 or the pressure control valve 220 so that the value is always within the set value.

Referring to the operation example of the pressure control means,

First, the sensor unit 230 continuously detects and sends a signal to the controller 240 to determine whether the air bellows assembly 160 maintains a constant pressure at all times.

The set pressure (cushion pressure) of the air bellows assembly 160 may be set in the same manner as a batch, or may be individually set according to the mold pressure object.

The controller 240 controls the operation of the compressor 200 until the pressure value in the air bellows assembly 160 reaches a set value, and when the set value reaches the set value, the controller 240 overcharges the pressure through the pressure control valve 220. It will be cracked down.

Subsequently, when the air pressure in the air bellows assembly 160 becomes less than the set value due to leaking to the outside, the compressor 200 is restarted until the set pressure value is reached according to the detection signal of the sensor unit 230. .

At this time, the operation of the compressor 200 is preferably to be made in the rising section of the slide (110).

4 is an enlarged view of an air bellows assembly according to the present invention.

Looking at the detailed configuration of the air bellows assembly 160 with reference to Figure 4, the air bellows assembly 160 of the present invention is largely air bellows 161, upper cap 162, lower cap 163, hermetic coupling Means 164.

First, the air bellows 161 is manufactured in the form of a corrugated pipe in which the expansion section 161a and the contraction section 161b are repeated along the length direction. The corrugated pipe is preferably made of a ductile, durable metal material.

In addition, the support ring (161c) is coupled to the outer diameter of the contraction section (161b), the support ring (161c) serves to suppress the air bellows 161 is expanded in the transverse direction by the internal air pressure to deform. .

In addition, the upper and lower ends of the air bellows 161 provide a role and a shape as a coupling end, and the upper and lower ends of the air bellows 161 protrude outwards in an outward direction so that the annular engaging protrusion 161d continues along the rim. To form.

The upper cap 162 is in contact with the upper portion of the air bellows 161 is coupled in a state capable of airtight inside.

In addition, the lower cap 163 is in contact with the lower portion of the air bellows 161 is coupled in a state capable of airtight inside.

At this time, the upper cap 162 and the lower cap 163 is manufactured in a circular plate shape, the bolt fastening holes 162a, 163a are formed at equal intervals around the outer circumference.

The upper cap 162 and the lower cap 163 and the air bellows 161 is coupled using a gas tight coupling means 164, the air tight coupling means 164 is air as shown in the enlarged view of FIG. An opposing protrusion 164a is formed to oppose the engaging protrusion 161d of the bellows 161.

The opposite protrusion 164a is used to be fitted with the air bellows 161 engaging protrusion 161d, and then fastened to the upper cap 162 or the lower cap 163 using the bolt member 165.

At this time, the airtight coupling means 164 is formed with a bolt through hole (164b), assembled in a circular direction in accordance with the number of bolt fastening holes (162a, 163a) formed in the upper cap 162 and the lower cap 163. As a result, the upper cap 162 and the lower cap 163 and the air bellows 161 are coupled in an airtight state.

In addition, the hermetic coupling means 164 may serve as a kind of spring washer by providing a “U” shaped curvature. For example, when the bolt member 165 is fastened, the elastic deformation is performed by the fastening force and the elastic restoring force is continuously applied, thereby preventing the nut loosening of the bolt member 165, and the upper cap 162 and the lower cap. It is possible to prevent the airtight coupling state between the 163 and the air bellows 161 from loosening.

5 is a planar view of the air bellows assembly according to the present invention.

Referring to FIG. 5, it can be seen that each air bellows assembly 160 is arranged in two rows in total so that pressure is distributed evenly over the entire area of the mold pressure object.

Of course, the installation number, size, and arrangement of the air bellows assembly 160 may be modified in various forms due to this purpose.

In the present invention, a plurality of guide posts 180 are installed between the slide adapter 120 and the slide 110 across the buffer space 150 in the vertical direction, and the pin plate penetrates the guide posts 180. The vertical operation of the 140 and the air bellows assembly 160 can be guided, where the respective guide posts 180 are installed as shown in FIG. 5.

It can be seen in FIG. 5 that the installation positions of the guide posts 180 are located at four locations between the air bellows assembly 160 and the air bellows assembly 160, which is a function of the pressure applied to the entire pin plate 140. The position where the balance can be arbitrarily selected is selected, which can be arranged differently according to the shape, structure and pressure distribution of the mold pressure object.

In addition, the bearing member 181 may be installed inside the through hole of the pin plate 140 contacting the guide post 180 to prevent friction and abrasion between the guide post 180 and the pin plate 140. have.

In this case, the bearing member 181 may be an oilless bearing.

The present invention may further form an auxiliary actuator 190 for rapid restoration after the contraction movement of the air bellows assembly 160.

For example, the cushioning pressure is applied to the air bellows assembly 160 through the cushion pin 130 during the mold pressing operation, and the air bellows 161 acting as a damper is contracted. After the pressing operation, the slide 110 is formed. At the same time, the auxiliary actuator 190 is operated to push the pin plate 140 toward the slide adapter 120 so that the ends of the air bellows 161 coupled with the pin plate 140 are unfolded together to quickly form the original shape. It will play a secondary role to ensure restoration.

At this time, the auxiliary actuator 190 may be in the form of a pneumatic or hydraulic cylinder, in this case, the cylinder body is coupled to the pin plate 140 side, the piston rod side is coupled to the slide adapter 120 side By repeatedly operating the forward and backward can be artificially in close contact with the pin plate 140 side and the slide adapter 120 side.

In the opposite form, the cylinder body may be coupled to the slide body side, and the piston rod may be coupled to the pin plate side to repeat the forward and reverse operations.

According to the present invention, a buffer space is formed on a slide of a press, and in the buffer space, a plurality of air bellows assemblies are arranged in a checkerboard shape by aligning a plurality of rows and columns, so that the press pressure is uniformly distributed so that the precision machining operation is performed. It is possible to secure the expensive press equipment by buffering the shocks during press operation, and to ensure the quick operation of the press operation by assisting the auxiliary actuator for quick restoration after the contraction movement of the air bellows assembly. This provides an advantage of improving productivity.

As described above, the present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are within the scope of the claims.

110: slide 120: slide adapter
121: pinhole 123: adapter hole
130: cushion pin 140: pin plate
150: buffer space 160: air bellows assembly
161: air bellows 161a: extension section
161b: contraction section 161c: support ring
161d: locking projection 162: upper cap
162a: bolt fastener 163: lower cap
163a: bolt fastener 164: airtight coupling means
164a: Opposing protrusion 164b: Bolt through hole
165: bolt member
170: cushion plate 180: guide post
181: bearing member 190: auxiliary actuator
200: compressor 210: equalization chamber
211: inlet 213: outlet
220: pressure control valve 230: sensor
240: control unit

Claims (7)

A slide adapter 120 in which an upper die is installed is formed below the slide 110 of the press, and a plurality of cushion pins 130 interlocked in the vertical direction connected to the upper die are interpolated in the slide adapter 120. The pin plate 140 is installed on the upper portion of the slide adapter 120 to contact the upper end of the cushion pin 130 so that the press pressure is transmitted upward and downward, and the buffer space 150 is formed on the pin plate 140. In the space 150, a plurality of air bellows assembly 160 is arranged in a checkerboard form by matching a plurality of rows and columns,
A compressor 200 generating compressed air and an inlet port 211 connected to the compressor 200 are formed, and an expansion channel 213 gradually extending from the inlet port 211, and the expansion channel 213. The pressure equalizing chamber 210 which is branched from and forms a plurality of discharge ports 215 for supplying compressed air to the air bellows assembly 160, and a pressure control valve installed at the compressed air inlet side of the air bellows assembly 160. Compressed air supply means consisting of 220; And
The sensor unit 230 for detecting the pressure in the air bellows assembly 160 and the output value of the sensor line unit 230 are calculated so that the pressure value in each air bellows assembly 160 is always within a set value. Pressure control means consisting of a control unit 240 for controlling the 200 or the pressure control valve 220; Press apparatus having a slide cushion pressure correction function, characterized in that it further comprises.
The method of claim 1,
Press device having a slide cushion pressure correction function, characterized in that the cushion plate 170 is further installed between the slide adapter (120) and the pin plate (140).
The method of claim 1,
A plurality of guide posts 180 are installed between the slide adapter 120 and the slide 110 across the buffer space 150 in a vertical direction, and a pin plate 140 penetrating the guide posts 180. Press device having a slide cushion pressure correction function, characterized in that the vertical movement of the air bellows assembly (160) is guided.
The method of claim 1,
Press apparatus having a slide cushion pressure correction function, characterized in that for further forming a secondary actuator (190) for rapid recovery after the contraction movement of the air bellows assembly (160).
The method according to any one of claims 1 to 4,
The air bellows assembly 160,
An air bellows 161 in which air is filled in a corrugated pipe form;
An upper cap 162 for sealing an upper portion of the air bellows 161;
A lower cap 163 for sealing a lower portion of the air bellows 161; And
Pressing apparatus having a slide cushion pressure correction function comprising a; airtight coupling means (164) for hermetically coupling between the upper cap (162) and the lower cap (163) and the air bellows (161).
The method of claim 1,
Pressing chamber 210 is a press device having a slide cushion pressure correction function, characterized in that a plurality of air bellows assembly 160 is formed along the arrangement sequence.
The method of claim 1,
Slide cushion pressure, characterized in that the step of forming the diameter of the discharge port 215 of the pressure equalizing chamber 210 from the small diameter discharge port 215 to the gradually larger discharge port 215 in the order of closeness to the inlet 211 side. Press device with correction function.

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